This photo of the Rough-legged Buzzard (known as the Rough-Legged Hawk in North America) is and isn't the first I've actually managed to see this species - there was one across the Swale from Oare Marshes a few years ago but too distant to differentiate from the Common Buzzards there, but here, even at the massive distance this photo was taken, the features can be seen clearly - very pale with dark wrists and a dark panel on the stomach, plus hovering a lot more than normal buzzards. They are an irruptive species in the UK, similar to Waxwings in that while a few turn up every year, big influxes can take place when their food supply is low in their native Scandinavia and Northern Russia. These are obviously the best years to look for them.